LDR Light Sensor Module

LDR Light Sensor Module 

The LDR Light Sensor Module is a simple and effective light-sensing board used to detect ambient light intensity. It utilizes a Light Dependent Resistor (LDR) as the sensing element, which changes its resistance based on the surrounding light level — decreasing with higher light intensity and increasing in the dark.

This module is commonly used in automation, robotics, and smart lighting projects. It can directly interface with microcontrollers like Arduino, Raspberry Pi, ESP32, or PIC to enable light-based control systems.

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Features:-

• Can detect ambient brightness and light intensity
• Adjustable sensitivity (via blue digital potentiometer adjustment)
• Operating voltage 3.3V-5V
• With fixed bolt hole for easy installation
• Small board PCB size: 3cm * 1.6cm
• Power indicator (red) and the digital switch output indicator (green)
• Using LM393 comparator chip, stable

Applications

• Automatic street lighting
• Day/Night detection systems
• Smart home automation
• Solar garden lights
• Light-following robots
• Security systems
• Brightness control in displays